CN203143597U

CN203143597U - Control circuit of PLC

Info

Publication number: CN203143597U
Application number: CN 201320146556
Authority: CN
Inventors: 陈亮; 宇黎亮
Original assignee: Shanxi Luan Mining Group Co Ltd
Current assignee: Shanxi Luan Mining Group Co Ltd
Priority date: 2013-03-28
Filing date: 2013-03-28
Publication date: 2013-08-21
Anticipated expiration: 2023-03-28

Abstract

The utility model discloses a control circuit of a PLC, and belongs to the technical field of mining PLCs. The control circuit of the PLC can be suitable for a PLC control device which has comprehensive control over a coal feeder and a belt conveyor at a coal mine. According to the technical scheme, the control circuit of the PLC comprises the PLC, an analog input module, a digital input module, a text display, a D/A conversion module, a power module, a current transformer, an earth leakage lockout detection module and a frequency converter; the PLC is connected with the analog input module, the digital input module, the text display, the D/A conversion module and the power module respectively; the current transformer is connected with the analog input module; the earth leakage lockout detection module is connected with the digital input module; the frequency converter is connected with the D/A conversion module. The control circuit of the PLC is suitable for various coal mines.

Description

A kind of PLC controller controling circuit

Technical field

A kind of PLC controller controling circuit of the utility model belongs to mining PLC controller technology field, is specifically related to a kind of PLC control circuit for the control of colliery feeder integrated belt machine.

Background technology

Along with improving constantly of state-of-art; adopted the comprehensive extraction system that comprises that coalcutter, feeder and belt feeder etc. are formed in the increasing colliery; but because the difference of coal bed texture; the coal seam of more particularly containing the water coal; the proportion that the coalcutter digging is produced coal occurs significantly changing through regular meeting; generally speaking; the coal supply power of feeder certain; will cause the belt feeder load to increase like this; the electric current of belt feeder master motor raises; this can bring potential safety hazard for the belt feeder system, the out of reach coal mine production safety, reliably, principle efficiently.

The utility model content

The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: a kind of PLC control setup that goes for colliery feeder integrated belt machine control is provided.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of PLC controller controling circuit comprises: PLC controller, analog input module, digital input module, text display, D/A conversion module, power module, current transformer, earth leakage search/lockout detection module and frequency converter;

Described PLC controller links to each other with power module with analog input module, digital input module, text display, D/A conversion module respectively, described current transformer links to each other with analog input module, described earth leakage search/lockout detection module links to each other with digital input module, and described frequency converter links to each other with the D/A conversion module.

Described PLC controller also is connected with indicator lamp, control button and communication module.

Described a kind of PLC controller controling circuit also includes rotation direction sensor, and described rotation direction sensor links to each other with analog input module.

Described current transformer is serially connected in the inclined shaft belt feeder master motor circuit, and described earth leakage search/lockout detection module links to each other with feeder master motor, and described frequency converter links to each other with feeder master motor, and described rotation direction sensor is installed on the feeder winch.

The beneficial effect that the utility model compared with prior art has is: the utility model is by control and the arithmetic capability of PLC controller; adopt frequency control; rely on current transformer and earth leakage search/lockout detection module; can realize the Comprehensive Control to colliery feeder belt feeder; protect belt feeder effectively, realized the automatic control to feeder simultaneously, improve safety and the reliability of feeder system operation; and the minimizing power consumption, saves energy.

Description of drawings

The utility model is described in more detail below in conjunction with accompanying drawing:

Fig. 1 is electrical block diagram of the present utility model;

Among the figure: 1 is that PLC controller, 2 is that analog input module, 3 is that digital input module, 4 is that text display, 5 is that D/A conversion module, 6 is that power module, 7 is that current transformer, 8 is that earth leakage search/lockout detection module, 9 is that frequency converter, 10 is that indicator lamp, 11 is that control button, 12 is that communication module, 13 is that rotation direction sensor, 14 is feeder master motor.

The specific embodiment

As shown in Figure 1, a kind of PLC controller controling circuit of the utility model comprises: PLC controller 1, analog input module 2, digital input module 3, text display 4, D/A conversion module 5, power module 6, current transformer 7, earth leakage search/lockout detection module 8 and frequency converter 9; Described PLC controller 1 links to each other with analog input module 2, digital input module 3, text display 4, D/A conversion module 5 and power module 6 respectively, described current transformer 7 links to each other with analog input module 2, described earth leakage search/lockout detection module 8 links to each other with digital input module 3, described frequency converter 9 links to each other with D/A conversion module 5, PLC controller 1 also is connected with indicator lamp 10, control button 11 and communication module 12, the PLC controller controling circuit also includes rotation direction sensor 13, and described rotation direction sensor 13 links to each other with analog input module 2.

Described current transformer 7 is serially connected in the inclined shaft belt feeder master motor circuit, and current transformer 7 is gathered the real-time current signal of inclined shaft belt feeder master's motor, and the current signal of gathering is sent to PLC controller 1; Described earth leakage search/lockout detection module 8 links to each other with feeder master motor 14, described rotation direction sensor 13 is installed on the feeder winch, earth leakage search/lockout detection module 8 can be sent to PLC controller 1 with the earth leakage search/lockout signal of feeder master motor 14, rotation direction sensor 13 is used for detecting turning to of feeder winch, can correctly send the coal supply direction signal by it, improve safety and the reliability of feeder system operation.

The control core that above-mentioned PLC controller 1 is whole PLC controller controling circuit, it can initialization system mode of operation and mode, various control commands that can delivery system, can received current transformer 7, the feedback signal of frequency converter 9 and each sensor, for realizing that 14 speed governing provide failure-free control to feeder master motor; Frequency converter 9 is energy feed units of power station, and frequency converter 9 links to each other with feeder master motor 14, and the electric energy that input power frequency electric energy can be converted to frequency adjustable by it provides feeder master motor 14, to reach the purpose of control feeder master motor 14 rotating speeds; PLC controller 1 carries out computing by the current information that current transformer 7 is sent into, and with the reference signal of operation result as the control coal-supplying amount, thereby implements accurately control.

Described PLC controller 1 is connected with text display 4, power module 6, indicator lamp 10, control button 11 and communication module 12, PLC controller 1 can link to each other with the colliery complex control system by communication module 12, real time data is sent to Control Room, also can realize Control Room to the Long-distance Control of PLC controller 1, various working parameters, mode of operation, fault parameter and faulty condition that above-mentioned text display 4 can on-line monitoring feeder belt feeder; The working environment in colliery has damp, dust is also many, so needs for safety of coal mines, described PLC controller 1, power module 6, frequency converter 9 and communication module 12 are installed in the explosion-proof tank, and described text display 4, indicator lamp 10 and control button 11 are installed on the above-mentioned explosion-proof tank chamber door.

The utility model is by control and the arithmetic capability of PLC controller 1; adopt frequency control; rely on current transformer 7 and earth leakage search/lockout detection module 8; can realize the Comprehensive Control to colliery feeder belt feeder; protect belt feeder effectively, realized the automatic control to feeder simultaneously, improve safety and the reliability of feeder system operation; and the minimizing power consumption, saves energy.

Claims

1. a PLC controller controling circuit is characterized in that: comprising: PLC controller (1), analog input module (2), digital input module (3), text display (4), D/A conversion module (5), power module (6), current transformer (7), earth leakage search/lockout detection module (8) and frequency converter (9);

Described PLC controller (1) links to each other with analog input module (2), digital input module (3), text display (4), D/A conversion module (5) and power module (6) respectively, described current transformer (7) links to each other with analog input module (2), described earth leakage search/lockout detection module (8) links to each other with digital input module (3), and described frequency converter (9) links to each other with D/A conversion module (5).

2. a kind of PLC controller controling circuit according to claim 1, it is characterized in that: described PLC controller (1) also is connected with indicator lamp (10), control button (11) and communication module (12).

3. a kind of PLC controller controling circuit according to claim 1 and 2, it is characterized in that: described PLC controller controling circuit also includes rotation direction sensor (13), and described rotation direction sensor (13) links to each other with analog input module (2).

4. a kind of PLC controller controling circuit according to claim 3, it is characterized in that: described current transformer (7) is serially connected in the inclined shaft belt feeder master motor circuit, described earth leakage search/lockout detection module (8) links to each other with feeder master motor (14), described frequency converter (9) links to each other with feeder master motor (14), and described rotation direction sensor (13) is installed on the feeder winch.